I think the following from Amazon’s reviewer (Singha) just about sums it up:
1. Don’t use your head. Lose yourself to the moment, passion. Don’t get calm, get charged. Trust yourself. Don’t over-analyze. Put pressure on yourself! Devise a method to get yourself in the right frame. Use it every time.
2. Don’t put limits on yourself. Don’t set goals. They aren’t stretching, they’re limiting. Chase a dream that is downright unachievable.
3. Hard work is overrated. The key is to do the right things, not necessarily doing things right
4. Don’t try and hedge your risks. Put all your eggs in one basket and WATCH THAT BASKET
5. There is no such thing as too much self assurance. Arrogant SOBs who believe in themselves are the ones who run the world. Don’t believe the experts (think Dell, Buffet, Gates, Paige&Brin, Columbus, the earth is flat?, etc). And confidence is not your track record… these guys weren’t confident in themselves after they had proved themselves right… no, they proved it before.
6. Being a team player involves conforming and conforming will at the end of the day bring you nothing but mundane results being achieved by all the others conforming.

My take-aways to become an over-acheiver:
1. Design for yourself a pre-performance routine can help. But it must be yours. “A pre-performance routine is about getting your mind ready to perform.”
2. Pick a target to shoot and focus – like playing a tennis match.
3. Stress is a good thing for the overachievers – like Bill Russels’s barfing up before every game. Don’t try to remove the stress.
4. Do the best that are within your control and don’t worry about anything else. Be “Zen” like.
5. Define your philosophy of performance and engagement.
6. The over-achiever doesn’t dwell on his failures but rise above them – the ability to “mess around.” Michael Jordan is the best basketball player because he failed the most. John Wooden’s guiding principles, ” The team that makes the most mistakes wins.”
7. Use the “Trusting Mindset” during performance, not “Training Mindset.”

Great book on becoming an overachiever. Lots of good sports stories, which are the author’s area of expertise. Some of the stories a bit long but could be appealing to sports fan or athletes who want to achiever super performance.